CONCHOLOGY.— GLOSSARY 



109 



Na'creous. — Of the nature of mother- 

 of-pearl. 

 Na'ssa. — Latin. A net, a snare. A 



genus of gasteropods. 

 Na'tica. — Latin. Name of a genus 



of gasteropods (pages 34 and 51). 

 Nau'tilus. — From the Greek, Nau- 



tilos, name of the Argonaut. A 



genus of cephalopods. 

 Ne'moral. — From the Latin, nemus, 



a wood. Belonging or relating to 



a wood or grove. 

 Neri'ta. — Latin. A shell-fish. A 



genus of gasteropods (page 51). 

 Neriti'na. — Latin. Diminutive of 



Nerita. A genus of gasteropods 



(page 51). 

 Nerv'ous. — Belonging or relating to 



the nerves. 

 Nilo'ticus. — Latin. Belonging to 



the Nile. 

 Ni'tkd. — From the Latin, niteo, I 



shine. Glossy. 

 NoDo'sE, — Knotty. 



Nu'cHA (nu-ka). — The nape of the 

 ^ neck, 



I Nu'cLEus. — A kernel. A centre 



around which matter has accumu- 

 lated. 

 Nu'da, — Latin. Naked. 

 Nu'dibrancii, — Relating to the Nu- 



dibranchiata. 

 Nu'dibranchia'ta. — From the Latin, 



nudus, naked, and hranchia, gills. 



(Name of an order of gasteropods. 

 Nummuli'tes. — From the Latin num- 

 mus, money, and the Greek, lithos, 

 stone. An extinct genus of cepha- 

 lopods, of a thin lenticular shape, 

 divided internally into small cham- 

 bers. These occur so abundantly 

 in some parts of the chalk forma- 

 tion, that the name of nummulite 

 limestone is given to the strata so 

 characterized. 

 Ob'i.ong-o'vate. — Egg shaped, or oval. 

 Ob'solete. — Indistinct, not well de- 

 fined. 

 O'cellated. — From the Latin, ocu- 

 lus, an eye. Marked with eye- 

 like spots. 

 O'cHRKous (ok'-re-us). — Of the colour 



of yellow ochre. 

 O'cTOPUs. — From the Greek, okto, 

 eight, and pons, foot. Name of a 

 g«nus of cephalopods. 



10 



Octopo'dia. — A tribe of cephalopods. 



CEso'PHAGEAL. — Belonging to the 

 oesophagus. 



CEso'PHAGus. — Latin. The gullet. 



Of'fuscated. — Darkened, clouded, 

 dimmed. 



Officina'lis. — Latin. Officinal. — 

 From officina, a shop. Applied to 

 what is ready prepared. 



Oli'va. — Latin. An olive. A genus 

 of gasteropods. 



Oliva'ceous. — Being of a greenish 

 olive colour. 



Onchi'dium. — A genus of gasteropods 

 (page 41). 



OpA'auE. — From the Latin, opacus^ 

 dark. Incapable of transmitting 

 liglit. 



Ope'rculum. — From the Latin, 

 operio, I cover. The lid or door 

 which covers anything. 



O'pTic. — From the Greek, optomai, I 

 see. The principal nerve of vision 

 is so called. 



Orbi'cula. — From the Latin orhis, a 

 circle. A genus of brachiopod 

 mollusks (page 90). 



Orbi'cular. — Spherical, circular, 

 round. 



O'rgan. — From the Greek, organon, 

 an instrument. Part of an organ- 

 ized being, destined to exercise 

 some particular functiorf. 



Organiza'tion. — A mode of structure. 



Ostra'cea. — Name of a family of 

 bivalves. 



Os'trea. — Latin. An oyster. Name 

 of a genus of the family of Os- 

 tracea. 



O'vARiEs. — Female organs which 

 contain the ova or eggs. 



O'vATE. — Shaped like the longitudi- 

 nal section of an egg. 



O'viDUCT. — From the Latin ovum, an 

 egg, and duco, I conduct. The 

 tube which conveys the ovum from 

 the ovary. 



Ovi'PAROus. — From the Latin, ovum^ 

 an egg, and pario, I produce. Ap- 

 plied to animals whose young are 

 produced by means of eggs. 



O'voiD. — Oval. 

 j O'vuLA. — From the Latin, ovum, an 

 ' egg. A genus of gasteropods. 



O'vuL.E. — Plural of ovula. 

 I Pa'latine.— Relating to the palate. 



